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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 20 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

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  1. 1.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  5. 5.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  9. 9.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  10. 10.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  12. 12.🏋️ A force of 270 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 90 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  19. 19.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?

Answer key

  1. 50
  2. through a distance
  3. 200
  4. 1
  5. 180
  6. 6
  7. 1540
  8. load ÷ effort
  9. 2
  10. 5
  11. no, work stays the same
  12. 2160
  13. 360
  14. 370
  15. 60
  16. 200
  17. 5
  18. joule (J)
  19. 360
  20. 8
  21. 600
  22. 640
  23. 160
  24. 3
  25. 3
  26. 240
  27. 4
  28. 3
  29. 2
  30. 3600
  31. 5
  32. 2
  33. 450
  34. 3
  35. 280
  36. 130
  37. 130
  38. 6
  39. 520
  40. 2

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